Batch Download Pictures From Website

For example:

If the url of the picture includes an space: Picture 22001.jpg, the file is saved as Picture%2022001.jpg. The same thing happens with other chars '[' ']', etc

I know that urls must have those %xx, but files should be saved with the original filename, is it possible?

Try for example this url: http://www.hpphoto.com/servlet/com.hp.H ... d=28571133 Full pictures must be viewed clicking on the thumbnail and then clicking on the option 'original size' (at the bottom/right). The 'original size' link is the javascript command: javascript: openwinScreen('39570261 ...